Rotary pump



f n.1z 1954 H. E. DE MENT Em 2,665,642

ROTARY PUMP Filed Sept. 22, 1951 INVENTORS HAROLD E. DE MENT AND 4 HERSCHEL 1.. WISNASKY FI fl G BY flafi,

ATTORNEY Patented Jan. 12, 1954 ROTARY PUMP Harold E. De Ment, Decatur, and Herschel L. Wisnasky, Forsyth, 111., assignors to Tryco Manufacturing 00., Inc., Decatur llL, a corporation of Illinois Application September 22, 1951, Serial No. 247,786

1 Claim. (01. 103-135) Our invention has to do with rotary pumps; an object being to provide a pump of simple and sturdy, as well as efiicient design and construction such as will be a minimum of bother to operate and will be dependable to do the work set aside for it in a most satisfactory manner.

A further purpose of our pump is to provide a rotary pump, a resilient spring member, operable with the sliding blades of the pump and a. centering pocket below it, for seating a dip in the spring body center to automatically urge a centering action constantly on the position of the spring, thus preventing it from sliding to one side and rubbing against the cylinder side walls.

A further purpose of our new rotary pump is to provide in such a pump the combination of centering means giving the spring longer wear with a true pump cylinder having a blade mounting that is excentric axially and with the blades slidable radially as their excentric supporting axis is rotated where it extends through such a cylinder.

A particular purpose of our new rotary pump is to provide in one simple and sturdy assembly a combination of pump housing, the end walls of which are shaped to define blade supporting spindle bearings registering in an excentric position in the cylinder of the housing with the pump blades operatively slidable radially in and out from the axis and with it, a centering spring under each blade and with an intake and outlet port defined in spaced position from each other about the arcuate wall of such cylinder.

We achieve the purposes of our new pump by the invention disclosed in this specification, defined in the claim and shown in the drawings, wherein:

Fig. 1 is a section detail in perspective of our new rotary pump.

Fig. 2 is an end view of our invention with end plate removed.

Fig. 3 is a side view of the blade centering spring in our pump.

Fig. 4 is an end view of our pump.

Fig. 5 is a detail of blade spring fitting position in this pump.

We shall now set forth our disclosure of this invention as we refer to the drawings occasionally to make its functions and construction the more fully comprehensive.

We are aware of the existence of certain other forms of rotary pumps, but our new pump is constructed to provide new and novel features of operative improvement over others that may have some detail of remote similarity in design.

In fact we feel that the serviceable details of our pump construction will define means for a more sturdy operative assembly and will do more work with less upkeep efiort than any such pump of similar general appearance.

Thus for a more detailed analysis of our new rotary pump we first wish to point out the housing l of our pump which has a central cylinder 2, a pair of opposed end plates 3 and 4 closing cylinder 2 and each provided with an excentric bearing hole 5 and 6 respectively for the rotary support of shaft 1 which in turn has an integral pump-blade mounting 8 provided with a series of radially disposed slots 9 for the operative slidable support of pump blades l0 therein.

A novel design and construction of spring I I (see Fig. 5) operable to set up as shown in each of center pockets 2| under the respective blades I0, is adapted to hold the spring I l centrally and away from the inner cylinder end walls l2 of the pump.

Note that bottom coils 22 and 23 and top coils 24 and 25 of spring II are thus formed to give this spring II longer wear in its operative position in its slots 9. Note too that spring II is held centered by its center body dip 26 as it seats into center pocket 2|.

Note too, that since shaft 1 is operable to rotate in an off center position where it extends through cylinder 2 with its slots 9 in blade mounting 8, then this very action causes blades I0 to slide in and out in slots 9 as they whirl with centrifugal force, out against inner wall l2 of cylinder 2 with spring member I I constantly and resiliently urging blades Ill to press outwardly in their central position where they thus effect a most forceful pumping action as they swing through the widening crescent area l3 of the pump cylinder 2.

The central blade mounting 8 has all 01' its blade slots 9 (which slidably house blades I0), disposed in an angular position (see these slots in Fig. 2).

Thus by this angular position of slots 9 the position of contact of blades In with inner wall l2 of cylinder 2 tends to urge just enough binding stress of blades In to create a more firm and a more effective rotary pumping force; while this construction in combination with the operative efliciency of spring ll behind each blade In defines a new and most novel and eifective rotary pump construction.

Note too, that when liquids are moved by whirling blades HI these liquids are picked up at port H at the thin end ii of crescent space I 3 and discharged under great pressure at the opposed port 3 at opposed thin end I! of crescent area I3.

It will be seen that intake port l4 communicates with crescent area I through intake slot I8; while outlet port l9 communicates with ores cent area l3 through outlet slot 20.

Having thus set forth the outstanding features of operative ellleiency of our new rotary pump, what we claim is:

A rotary pump comprising a housing shaped to define a horizontal central cylinder, a shaft bearing axially eccentric at each end thereof, and a pumping blade supporting shaft operable to rotate eccentrically in saidbearings to produce a pumping action, a rotary blade support housing, fixed on said shaft and provided with blade slots disposed in angular postiion with said shaft, pump blades slidably housed in said angular slots, each respectively, for an outward urge by centrifugal force when said pump is running and a spring housed under said blades each respecfingers each also provided with terminal coils to make the spring longer lasting for wear.

HAROLD E. DE MENT. HERSCHEL L. WISNASKY.

. References Cited in the file of this patent UNITED STATES PATENTS Numb er Name Date 138,433 Quirk Apr. 29, 1873 825,374 Black July 10, 1906 1,290,251 Leiman Jan, 7, 1919 20 2,357,333 Kendrick et a1 Sept. 5, 1944 

